Twilight Zone ninth switch column (clock switches)
Column 9 (gray-white wire, J5-1 on the auxiliary board) holds the clock switches. Rows 1 to 4 (white-brown, white-red, white-orange, white-yellow): clock 15 minutes, 0 minutes, 45 minutes, 30 minutes. Rows 5 to 8 (white-green, white-blue, white-violet, white-gray): clock hour 1, 2, 3, 4. Test them with the game's Clock Test, not the switch test.
Systems
Games
Related tips
- Solenoid numbers above 28 and the 8-driver auxiliary board
- Twilight Zone: "clock is broken" error
- Twilight Zone: LED lighting mod for the clock
- Twilight Zone clock uses eight sensitive U optos
- Twilight Zone: diode mod to cool the clock with stock bulbs
- Switch columns to U20 pins
- Testing CPU switch columns with the switch levels test
- Twilight Zone trough proximity sensor (switch 26) problems
Source: Repairing Williams/Bally WPC Pinball Games from 1990 to 1999, Part Two, Clay Harrell (pinrepair.com)